The Institute for Supply Management (ISM) said its index of national factory activity fell to 48.1 from 48.3 the month before. The reading was below expectations of 49.2 from a Reuters poll of 57 economists.

A reading above 50 indicates expansion in the manufacturing sector and a reading below 50 indicates contraction.

The employment index slid to 46.6 from 47.7 a month earlier, also marking a fourth consecutive month of declining employment in the sector.

New orders dropped to 47.2 from 49.1, matching a reading from July that was the lowest since June 2012. The prices paid index rose to 46.7 from 45.5, compared to expectations of 47.0.

(Reporting by Dan Burns; Editing by Chizu Nomiyama)